Spirit Familiar

[The Total Package]

The ability says: Your familiar’s spirit exits its body, leaving its empty shell behind, before flying at an enemy within 20 feet (4sq) and dealing 6d6 (21) spirit damage, with a basic Will save against your spell DC. If the familiar dealt damage, it then flies to an ally within 30 feet (6sq) of the enemy, restoring Hit Points equal to half the damage dealt. Your familiar then re-forms in its original square. At 9th level, and every 2 levels thereafter, the attack deals an additional 2d6 (7) damage.

I am trying to understand how much damage this spell would be dealing at level 16 and 18.

[NorrKnekten]

Since you pick it at level 8 the first highten is an 9.

So it goes
8: 6d6
9: 8d6
11: 10d6
13: 12d6
15: 14d6
17: 16d6
19: 18d6

So at 16 it deals 14d6, and at 18 it deals 16d6

[The Total Package]

Thanks a lot!